I believe panel 3 says:
"....Picking the cheap and definitely tasty sweets seems to be the most smart option."
And in panel 4 (from right to left)
"Ah Takashi's capacity is at its limit"
"Stop adding more options!"
I went to go check the raw link and find it in Japanese. I'm not that good at translating, but here is my guess.
I think in the second panel he says:
"I'm not thinking about tricking or giving you a disadvantage, I only want one thing."
"Understanding each other, buying, and even coming to the...
The anonymous messages' name have a meaning to it.
"yonDe", "KuRETA", "MINaSaN", "AriGAT0", "KOre", "KARAMo", yORoShiKU"
It means: Thanks everyone for calling me, I'll be in your care from now on (roughly)